Valve for controlling flow of gases



'R. H. DAVIS VALVE FOR CONTROLLING FLOW 0F GASES.

APPLICATION-FILED AUG-H, 1920. 1,398,845.

Patented Nov. 29, 1921 VALVE FOR CONTROLLING FLOW F GASES.

messes.

Specification of Letters Patent.

Patented Nov. 29, rear.

Application filed August 11, 1920. Serial No. 402,885.

To all whom it may concern:

Be it known that 1, ROBERT HENRY DAVIS, a subject of the King of Great Britain and Ireland, residingat 1S7 Westminster Bridge Road, London, S. E., in the county of London, England, have invented certain new and useful Improvements in Valves for C011- trolling Flow of Gases, of which the following is a specification.

The invention relates to valves which are employed for controlling the flow of gases from apparatus in which the gas is stored in liquid form.

In the form of such apparatus to which the invention is applicable there are two outlet pipes leading to the control valve fitting, one leading from the top of the liquid gas container for conveying the gas which boils off due to leakage of heat into the container, and the other leading from the vaporizer for conveying the gas which passes through the vaporizer.

The type of control valve fitting to which the invention relates contains two main portions, one a release valve which governs the pressure above the liquid in the container and the. other a throttle valve which controls the flow of gas through the vaporizer.

The present invention consists in an improved construction "of control valve fitting of the above type, the characteristic feature of which is that the axis of the throttle valve is at right angles to the axis of the inlet pipes to the fitting from the vaporizer or to the base plate of the fitting.

The object of theinvention is to provide an improved construction of control fitting of the above type, the novel features of which are set out in the following description and claims.

Figure 1 represents a side elevation of control valve fitting.

Fig. 2 represents a front part sectional elevation along the line-XX of Fig. 1.

Fig. 3 represents a sectional plan taken along the line Y-Y of Fig. 1.

The body 6 of the fitting projects from the base plane a, and the axis of the throttle valve 7) is arranged at right an les to the axis of the inlet pipes 0, d. The ody b has threaded openings for engagement by unions for connection to inlet pipes c, d, the former of which connects to the top of the liquid gas container (not shown) and the latter connects to the vaporizer (not shown).

The pipe 0 communicates by a port a with a pressure gage p and its outlet is governed by a release valve e the opening pressure of whlch is determined by a sprin f. The tension of this spring can be adjusted by a thlmble 9 provided with a lock nut h.

The pipe 03 communicates by a port 2' to the underside of a throttle valve 79 which s provided with a threaded spindle (7 passlng through a stufiing box 0. The How of gas through the pipe d and the pressure therein; is governed by the throttle valve whlch 18 adjusted by a hand wheel 7. The gas passing through the release valve issues through a port is and unites with the gas passlng through the throttle valve and thence issues through the outlet tube 0 If it is desired to divide the outlet into two streams, a second outlet pipe 0 atright angles to the first may be provided.

In some cases it is desirable to connect the control valve fitting direct to the vaporizer; 1n this case a base plate may in some cases be dispensed with.

I claim 1. In a control valve fitting for controlling the flow of gas from apparatus in which the gas is stored in liquid form and which is provided with a vaporizer, an inlet pipe adapted to be connected to the vaporizer, an inlet pipe adapted to be connected to the top of the liquid container, a throttle valve with axis at right angles to the axis of the first inlet pipe, a communicating passage between said throttle valve and said first inlet pipe, a release valve arranged in a passage in communication with the second inlet pipe, and passages for bringing the gas passing through the valves to a common outlet.

2. In a control valve fitting for controlling the fiow of gas from apparatus in which the gas is stored in liquid form and which is provided with a vaporizer, an inlet pipe adapted to be connected to the vaporizer, an inlet pipe adapted to be connected to the top of the liquid container, a

which the gas is stored in liquid formand which is provided with a vaporlzer, an lnlet pipe adapted to be connected to the vaporizer, an inlet pipe adapted to be connected to the top of the liquid container and parallel to the first inlet pipe, a throttle valve with axis at right angles to theaxis of the first inlet pipe, a communicating passage between said throttle valve and said first inlet pipe, a release valve arranged in a passage in communication with the second inlet pipe, and passages for bringing the gas passing through both valves to a common outlet.

4. In a control valve fitting for controlling the flow of gas from apparatus in which the gas is stored in liquid form and which is provided with a vaporizer, an inlet pipe adapted to be connected to the vaporizer, an inlet pipe adapted to be connected to the top of the liquid container, a throttle valve with axis at right angles to the axis of the first inlet pipe, a communicating passage between said throttle valve and said first inlet pipe, a release valve arranged in a passage in communication with the second inlet pipe, a pressure gage communicating with the second inlet pipe, means for adjusting the pres sure at which the release valve opens, and passages for bringing the gas passing through both valves to a common outlet.

5. In a control valve fitting for controlling the fiow of gas from apparatus ,in which the gasis stored in liquid form and which is provided with a vaporizer, an inlet pipe adapted to be connected to the vaporizer, an inlet pipe adapted to be connected to the top of the liquid container, a throttle valve with axis at right angles to the axis of the first inlet pipe, a communicating passage between therein,

the body being a threaded spindle carried by said throttle valve, a stuffing box engaging said spindle, an adjusting wheel attached to said spindle, a release valve arranged in a passage in communication with the second inlet pipe, means for adjusting the pressure at which the release valve opens, and passages for bringing the gas passing through both valves to a common outlet. 7

6. A control valve comprising a body formed with two inlet passages, pressure actuated means for controlling one passage, an independent manually operated means for controlling the other passage, the body being formed with a common outlet passage beyond both the said means.

7. A control valve comprising a body formed with a pair of inlet passages, pres sure actuated means for controlling one passage, a pressure indicating device mounted on the body and communicating with the last named passage to indicate the pressure and an independent manually oper ated means controlling the other passage,

formed with passages beyond both said means communicating with a common outlet.

S. A control valve comprising a body formed with two inlet passages, an adjustable pressure actuated means for controlling one inlet, an independent manually operated means for controlling the other inlet, and said body being formed with communicating passages from both said means leading to a common outlet.

b In testimony whereof I affix my signature.

ROBERT H. DAVIS.

said throttle valve and said first inlet pipe, 40 

